Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

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Test V: No High Speed Controller Area Network (HS-CAN) Communication, All Modules Are Not Responding

PINPOINT TEST V: NO HIGH SPEED CONTROLLER AREA NETWORK (HS-CAN) COMMUNICATION, ALL MODULES ARE NOT RESPONDING

Normal Operation
The HS-CAN uses an unshielded twisted pair cable, circuits VDB04 (WH/BU) and VDB05 (WH). The PCM, the transmission control module (TCM), the ABS module, the restraints control module (RCM), the 4X4 control module (if equipped), the air suspension module (if equipped) and the instrument cluster (IC) all communicate with the scan tool using the HS-CAN.

This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- ABS module
- Air suspension module (if equipped)
- IC
- PCM
- RCM
- TCM
- 4X4 control module (if equipped)


V1-V2:






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V8-V9:






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V12-V15:






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V22-V26:






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V31-V34:






V35: